Pool Chemistry - Chlor
Chlorine Dose & Test Log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
New: filter maintenance by pool or task type, add heater notes, and get corrected chlorine dose guidance for clearer water.
Chlor is the precision pool chemistry companion built for serious pool owners. Stop guessing - test smarter, dose accurately, and swim in perfectly balanced water every time.
WHETHER YOU OWN A POOL, SPA, OR HOT TUB
Chlor tracks every body of water you manage. Log test results, calculate exact chemical doses, and follow a smart maintenance schedule - all in one beautifully designed app.
ACCURATE CHEMICAL CALCULATORS
- Free Chlorine - calculate exact liquid chlorine, Cal-Hypo, Dichlor, or Trichlor dose
- pH - calculate muriatic acid or soda ash to hit your target
- Total Alkalinity - sodium bicarbonate dosing with precise measurements
- CYA (Cyanuric Acid) - stabilizer additions with partial drain guidance
- Calcium Hardness - raise calcium with calcium chloride calculations
- Langelier Saturation Index (LSI) - prevent corrosion and scaling
- SLAM Calculator - shock treatment with CYA-adjusted FC targets
- Salt Level - sodium chloride additions for saltwater pools
- Volume Estimator - calculate gallons from pool dimensions
SMART TEST LOGGING
- Log your water test results with a clean, fast interface
- Color-coded status indicators show exactly which parameters are in or out of range
- Full test history with timestamps and test kit identification
- Filter tests by pool or hot tub
CYA-ADJUSTED FREE CHLORINE TARGETS
Chlor uses the scientifically correct FC:CYA ratio to calculate your ideal free chlorine range - not the oversimplified 1-3 ppm most apps use. Your pool is as unique as your CYA level.
MAINTENANCE SCHEDULE
- Create recurring tasks (skimming, filter cleaning, equipment checks) with custom frequencies
- Tasks are automatically sorted by urgency: overdue, due this week, and upcoming
- Mark tasks complete with a single tap
MULTIPLE POOLS AND SPAS
Manage your backyard pool, the hot tub, and the spa all in one app. Each body of water gets its own test history, calculator context, and maintenance schedule.
DESIGNED FOR ACCURACY
Chlor's calculation engine is based on the industry-standard chemistry formulas used by professional pool technicians. Every dose calculation accounts for your pool volume, current levels, target levels, and chemical concentration.
CHLOR PRO
Upgrade to unlock all 9 calculators, full test history, AI Pool Assistant, LSI and SLAM tools, and unlimited pools and spas.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixed "Restore Purchases" so it correctly confirms your subscription is active even when you were already subscribed before tapping it. Also improved account deletion to properly clear your Apple ID connection and guide you through revoking app access from your Apple settings.
The developer, Karol Jaworski, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Karol Jaworski
- Size
- 7.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 18 or later.
- iPhone
Requires iOS 18 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Chlor Pro Monthly $4.99
- Chlor Pro Yearly Promo $39.99
- Chlor Pro Yearly $39.99
- Copyright
- © 2026 Karol Jaworski